JVC MA372IEN user service Power cannot be turned on

PREPARATION	INSTALLATION
This unit is designed to operate on 12 V DC, NEGATIVE ground electrical	The following illustration shows a typical installation. If you have any questions or require information regarding installation
systems. If your vehicle does not have this system, a voltage inverter is required,	kits, consult your JVC IN-CAR ENTERTAINMENT dealer or a company supplying kits.
which can be purchased at JVC IN-CAR ENTERTAINMENT dealers.	• If you are not sure how to install this unit correctly, have it installed by a qualified technician.

CONNECTION

WARNINGS

To prevent short circuits, we recommend that you disconnect the battery’s negative terminal and make all electrical connections before installing the unit.

•Be sure to ground this unit to the car’s chassis again after installation.

Notes:

•Replace the fuse with one of the specified rating. If the fuse blows frequently, consult your JVC IN-CAR ENTERTAINMENT dealer.

•It is recommended to connect to the speakers with maximum power of more than 50 W (both at the rear and at the front, with an impedance of 4 Ω to 8 Ω). If the maximum power is less than 50 W, change “AMP GAIN” setting to prevent the

speakers from being damaged (see “General settings—PSM”).

• To prevent short-circuit, cover the terminals of the UNUSED leads with insulating tape.

• The heat sink becomes very hot after use. Be careful not to touch it when removing this unit.

Heat sink

Parts list for installation and connection

A/B	C	D
Control panel/	Sleeve	Trim plate
Hard case
E	F	G
Power cord	Washer (ø5)	Lock nut (M5)

	I	J
H	Rubber cushion	Handles
Mounting bolt
(M4 × 5 mm ; M5 × 15 mm)

In dash-mounting

When you stand the unit, be careful not to damage the fuse on the rear.

Do the required electrical connections.

Bend the appropriate tabs to hold the sleeve firmly in place.

Removing the unit

Before removing the unit, release the rear section.

When using the optional stay

INSTALLATION /

ELECTRICAL CONNECTIONS	Fire wall	Stay (option)
Typical connections	Dashboard
Before connecting: Check the wiring in the vehicle carefully. Incorrect connection may cause serious damage to this		Screw (option)
unit. The leads of the power cord and those of the connector from the car body may be different in color.		Install the unit at an angle of less
1 Connect the colored leads of the power cord in the order specified in the illustration below.
		than 30˚.

2Connect the aerial cord.

3 Finally connect the wiring harness to the unit.					When installing the unit without using the sleeve
Note: If your vehicle does not have any accessory terminal, move the fuse from the fuse position 1 (initial position) to					In a Toyota car for example, first remove the car radio and install the unit in its place.
fuse position 2, and connect the red lead (A7) to the positive (+) battery terminal.
					Flat type screws (M5 × 8 mm)*	* Not supplied for this unit.
• The yellow lead (A4) is not used in this case.
		15 A fuse			Bracket*
				Fuse position 2	Flat type screws (M5
				Fuse position 1
Aerial					× 8 mm)*
					Pocket
terminal
			Rear ground terminal		Bracket*
				Ignition switch	PRECAUTIONS on power supply and speaker connections
Connect only the front speakers if your		Black		To the metallic body or
				chassis of the car
speaker system is two-speaker system.
	White with black stripe			To a live terminal in the
		Yellow *2		fuse block connecting to the
				car battery (bypassing the
Front speaker	White			ignition switch) (constant	TROUBLESHOOTING
				12 V)
(left)
				Fuse block
	Gray with black stripe	Red			• The fuse blows.
				To an accessory terminal in
					* Are the red and black leads connected correctly?
				the fuse block
Front speaker	Gray				• Power cannot be turned on.
					* Is the yellow lead connected?
(right)
	Green with black stripe	Blue with white			• No sound from the speakers.
		stripe		To the remote lead of other equipment or	* Is the speaker output lead short-circuited?
				power aerial if any (200 mA max.)	• Sound is distorted.
Rear speaker	Green	Brown			* Is the speaker output lead grounded?
(left)				To cellular phone system	* Are the “–” terminals of L and R speakers grounded in common?
	Purple with black stripe				• Noise interfere with sounds.
					* Is the rear ground terminal connected to the car’s chassis using shorter and thicker cords?
Rear speaker	Purple	*1	Not supplied for this unit.		• This unit becomes hot.
		*2	Before checking the operation of this unit prior to installation, this		* Is the speaker output lead grounded?
(right)
			lead must be connected, otherwise the power cannot be turned on.		* Are the “–” terminals of L and R speakers grounded in common?

• This unit does not work at all. * Have you reset your unit?

4 – EN